Well, the only real change that’s not easily reversible one might make when installing most of these units is if you don’t already have a hole to mount the faucet in. A renter definitely shouldn’t drill a hole in a countertop and most r/o units would require one. Any house built in the last few decades would probably have a built in dish soap dispenser you could pop out, but if not, no luck.

Other than that just basic hand tools are involved. I would have no problem installing one in a rental but I’m also comfortable with plumbing. It’s definitely a job that seems a lot more intimidating than it is.